Improvement in carbonic-acid-gas generators



C. H. THOMPSON.

Carbonic-Acid Gas Generators.

Patented March 31, 1874.

ZW/MW fw Uff/ZW Kw/y Mmm.

INITED STATES PATENT OFFICE.

CHARLES H. THOMPSON, OE OLEvELAND, OHIO, ASSIGNOR or ONE-HALE Hrs RIGHT To OHARLES M. MARTIN, OE NEW YORK, N. r.

IMPRVEMENT IN CARBONIC-ACIDGAS GENERATORS.

Specification forming part of Letters Patent No. 149,081, dated March 31, 1874; applicatior filed January 28, 1874.

To all whom it may concern:

Be it known that I, CHARLES H. THOMPSON, of Cleveland, Ohio, have invented an Improved Apparatus for the Continuous Generation of Garbonic-Acid Gas; and I do hereby declare the following to be a full and correct description ofthe Same, reference being had to the accompanying drawings, in which- Figure 1 is a vertical central section of my improved gas-generator on line A B of Fig. 2. Fig.` ,2 is a plan or top view ofthe same.

The same part is marked by the same letter in both gures.

My invention relates to the generation of carbonio-acid gas for the purpose of extinguishing fires, or any other purpose in which a large and continuous supply of gas is required. It consists of a main generating tank, connected by pipes, provided with stop-cocks, with a series of reservoirs, in which the gas-generating materials are separately contained, an`d from which they are supplied, as Wanted, to the generator, in the quantities and proportions required for the rapid generation ofthe gas, said reservoirs being arranged in duplicates, so that one set can be used while another set is being charged, in order that the supply of materials and the generation of gas may be continuous, the eftete materials being drawn oli below as fast as they cease to be efficient for the generation of gas, all as hereinafter more fully set forth.

In the accompanying drawings, C marks the main tank or central generator, Which is surrounded by and connected with the reservoirs D E F G. Of these reservoirs, D and F are intended to contain the solution of carbonate of soda, and E and G the dilute sulphuric acid. Vessel D is connected at bottom sel G is connected With the tank by pipes N and Q, having, respectively, stop-cocks g and h. Reservoirs Dand F are each provided with a stirring apparatus, consisting of a Winch, V, on the end of a shaft, the other end of which carries a miter-Wheel, .W, Which gears into two bevel-Wheels, X and Y, fixed, respectively, on top of a center shaft, C', and sleeve-shaft D. rlhese shafts are attached, respectively, to the rakes or stirrers B and A', placed near the bottom of each vessel. Winch V these rakers are rotated in opposite directions, and eiectually stir and commingle any materials which may be placed in the vessels in which they operate. Each of the vessels D E F G is provided with a glass gage, R, to indicate the quantity of liquid it contains. A waste-pipe, S, is placed near the bottom of tank C to draw oft' the eii'ete material, and a pipe, T, placed near the top of the tank, serves to convey the gas generated to the place Where it is intended to be used, Whether to extinguish a lire or for any other purpose.

The operation is obvious from the construction. The reservoirs D and F are supplied With a solution of carbonate of soda, Which is kept from deposition by the occasional rota tion of the stirrers. In the reservoirs E and G is placed sulphuric acid, diluted to the degree best adapted to produce a rapid and copious evolution of gas When in combination With the alkaline solution. The pipes leading from the vessels D E F G to the tank G are so proportioned as to deliver the proper relative amounts of the gas-generating materials to produce the most efficient result.

rlhe gas is conveyed to the place Where it f By operating the operating substantially in the manner described.

The above specification of my said invention signed and witnessed, at Tashin gton, this 22d day of January, A. D. 1874i.

CHARLES H. THOMPSON.

Witnesses:

WV. l). BELL, CHAs. F. STANSBUR'Y. 

